LOD: Add a LOD script

[xen2]

Idea is to allow users to have LOD with a small custom script, while a better system is being designed.
Starting point for such a script: #37 (comment)

It could either be an asset template or a component in the Engine class (first option is maybe better so that it is not hardcoded in engine and user can customize/extend it).

Probably need to adjust how to find current camera, and ideally gamestudio should automatically fill the ModelComponent to the one contained in the Entity this script is added to.

[kalysti]

Working on a pr. Coming asap..

[kalysti]

Auto Lod is ready to rumble. Currently there is just one issue. For some reasons i cant generate Thumbnails. So mby somebody else can help me to understand the issue.

[tebjan]

That's great news, thank you and welcome to the community!

If you make a PR and mark it as draft we can look into the code and make better suggestions. You could also point to the code where you want to generate the thumbnail.